Method for generating a high quality up-scaled image, and associated device
a high-quality, up-scaled technology, applied in the field of image processing, can solve the problems of generating a large amount of erroneous image information, corresponding side effects, and unreal high-resolution images generated by the conventional video playback device, and achieve the effect of high-quality, up-scaled high-resolution images
Inactive Publication Date: 2013-06-25
SILICON MOTION INC (TW)
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Benefits of technology
The invention provides a method and device for generating a high quality up-scaled image. The method involves using at least four pixels in a source image as reference pixels, calculating linear distribution values from these reference pixels, and adjusting these values based on the pixel values of at least three reference pixels to generate the high quality up-scaled image. This approach improves the quality and resolution of the image.
Problems solved by technology
As a result, regarding some image contents of the original image, the high resolution image generated by the conventional video playback device looks unreal since the original image inherently does not include complete image information required for generating the high resolution image.
When the conventional video playback device generates the high resolution image, a problem of generating a great amount of erroneous image information may occur.
However, no matter which solution is chosen, a corresponding side effect typically exists.
For example, utilizing a complicated algorithm may cause hardware resources to be insufficient.
In another example, utilizing a hardware circuit equipped with increased calculation capability may cause the overall cost to be too high.
Method used
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Embodiment Construction
[0014]Please refer to FIG. 1A, which illustrates a diagram of a device 100 for generating a high quality up-scaled image IUS according to a first embodiment of the present invention. The device 100 comprises a controller such as the controller 110, and further comprises a read only memory (ROM) 110M, where the ROM 110M is positioned within the controller 110. The controller 110 is arranged to execute a program code 110C to control operations of the device 100, and the ROM 110M is arranged to store the program code 110C. In practice, the ROM 110M can be an Electrically Erasable Programmable ROM (EEPROM). This is for illustrative purposes only, and is not meant to be a limitation of the present invention. According to some variations of this embodiment, the ROM 110M can be other types of ROMs, respectively.
[0015]According to this embodiment, the aforementioned controller utilizes at least four pixels within a source image IS as a plurality of reference pixels within the high quality u...
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A method for generating a high quality up-scaled image includes: utilizing at least four pixels within a source image as reference pixels within the high quality up-scaled image, where the reference pixels are utilized as a portion of pixels within the high quality up-scaled image, and are utilized as reference for generating another portion of pixels within the high quality up-scaled image; and calculating at least one portion of three linear distribution values corresponding to three quarter points between two adjacent pixels of the reference pixels according to pixel values of the two adjacent pixels and adjusting the portion of the linear distribution values according to pixel values of at least three reference pixels of the four reference pixels, and generating at least one pixel within the high quality up-scaled image accordingly. An associated device is also provided.
Description
BACKGROUND OF THE INVENTION[0001]1. Field of the Invention[0002]The present invention relates to image processing, and more particularly, to a method for generating a high quality up-scaled image, and to an associated device.[0003]2. Description of the Prior Art[0004]According to the related art, a conventional video playback device can perform an up-scaling operation on an original image to generate a high resolution image, and more particularly, an image having a resolution that is higher than the original resolution (i.e. the resolution of the original image). Typically, when generating a new pixel in the horizontal direction, the conventional video playback device only utilize the original pixels at the left and right sides of the new pixel as reference pixels. As a result, regarding some image contents of the original image, the high resolution image generated by the conventional video playback device looks unreal since the original image inherently does not include complete im...
Claims
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IPC IPC(8): G06K9/32
CPCG06T3/4007
Inventor HSIEH, CHAO-KUEI
Owner SILICON MOTION INC (TW)